The U.S. Energy Dept. has decided to abandon its original plan for the FutureGen 275-MW coal-fired power plant to test advanced carbon-capture and storage technologies. The agency announced Aug. 5 that will instead use its $1 billion in federal stimulus funding to refit and repower an existing plant in western Illinois to capture carbon dioxide. The money will go to members of the FutureGen Alliance, made up of U.S. and overseas utilities, powerproviders and other firm, as well as to Ameren Energy Resources, Babcock & Wilcox and Air Liquide Process & Construction to install new equipment at a 200-MW Ameren
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.